Definition of 'nicaea'
- an ancient city in Bithynia; founded in the 4th century BC and flourished under the Romans; the Nicene Creed was adopted there in 325
- the seventh ecumenical council in 787 which refuted iconoclasm and regulated the veneration of holy images
Synonyms: Second Council of Nicaea
- the first ecumenical council in 325 which produced the wording of the Nicene Creed and condemned the heresy of Arianism
Synonyms: First Council of Nicaea